I'm working on an installation of luminaires that have electronic power supplies that create a large inrush current at turn-on. A typical string of lights on a 20A branch circuit (277V) would create an inrush of 300A for 8.3ms (1/2 cycle).
Is a high-inrush type of CB the best solution (assuming I can't change the luminaire power supply, split the circuit, etc.)?
What CB brands and types are easiest to find?
I have been looking at a Heinemann AMR type (one of their curves goes to 30X rating for inrush), BUT it seems everyone only stocks them in UL1077 types rather than UL489. I need UL489.
I'm seeing more and more solid state lighting and some have low inrush and some have high inrush - it seems that this must be getting to be a more common problem as lighting migrates to electronic drivers.
Thanks for any thoughts.
Is a high-inrush type of CB the best solution (assuming I can't change the luminaire power supply, split the circuit, etc.)?
What CB brands and types are easiest to find?
I have been looking at a Heinemann AMR type (one of their curves goes to 30X rating for inrush), BUT it seems everyone only stocks them in UL1077 types rather than UL489. I need UL489.
I'm seeing more and more solid state lighting and some have low inrush and some have high inrush - it seems that this must be getting to be a more common problem as lighting migrates to electronic drivers.
Thanks for any thoughts.
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